Add vsync notification command line switch

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 71 matching lines @@
       RenderWidget* widget) {
   scoped_ptr<RenderWidgetCompositor> compositor(
       new RenderWidgetCompositor(widget));
 
   CommandLine* cmd = CommandLine::ForCurrentProcess();
 
   cc::LayerTreeSettings settings;
   settings.acceleratePainting =
       cmd->HasSwitch(switches::kEnableAcceleratedPainting);
   settings.renderVSyncEnabled = !cmd->HasSwitch(switches::kDisableGpuVsync);
+  settings.renderVSyncNotificationEnabled =
+      cmd->HasSwitch(cc::switches::kEnableVsyncNotification);
   settings.perTilePaintingEnabled =
       cmd->HasSwitch(cc::switches::kEnablePerTilePainting);
   settings.acceleratedAnimationEnabled =
       !cmd->HasSwitch(cc::switches::kDisableThreadedAnimation);
 
   int default_tile_width = settings.defaultTileSize.width();
   if (cmd->HasSwitch(switches::kDefaultTileWidth)) {
     GetSwitchValueAsInt(*cmd, switches::kDefaultTileWidth, 1,
                         std::numeric_limits<int>::max(), &default_tile_width);
   }
@@ skipping 405 matching lines @@
   return RenderThreadImpl::current()->OffscreenContextProviderForMainThread();
 }
 
 scoped_refptr<cc::ContextProvider>
 RenderWidgetCompositor::OffscreenContextProviderForCompositorThread() {
   return RenderThreadImpl::current()->
       OffscreenContextProviderForCompositorThread();
 }
 
 }  // namespace content